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' (NqModeL) H. J. GILBERT.

ROLLER MILL. Patented June 26, 1883.

jwmr.

N. PETERS. PhaQo-ljlhographer. Washmglon. DJ;

UNITED STATES- PATENT OFFICE.

HENRY .I. GILBERT, or DAYTON, OHIO, ASSIGNOR To STOUT, MILLS &

' TEMPLE, on sAMErLAoE;

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 280,170, dated June'26, 1883.

(No model.)

To wZZ whom it may concern:

Be it known that I, HENRY J. GILBERT, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Roller-Mills, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings, making a part of this specification.

My invention relates to that class of rollermills for making flour knownas gradual-rm duction mills, in which the grain or middlings is'fed froma hopper to one or more pairs of differentially-ruiming grinding orcrushing rolls, usually having a corrugated dress.

The object of my present invention is to provide housedspring-connections for uniting the outer pivoted roll-supporting armsand their operating-rods which can be simultaneously operated by cams oreccentrics, (shown in the application of John Livingston, filedsimultaneously with this, which I will presently describe,) or by anyother suitable means.

The novelty consists in the construction and combination of the parts,as will be herein set forth and specifically claimed.

In the accompanying drawings, Figure 1 is a sectionalview, in sideelevation, through the upper part and hopper of the machine, showing somuch thereof as is necessary to illustrate my present invention. Fig. 2is a sectional plan view through the line 00 00 of Fig. 1 of thehopper-bottom. Fig. 3 is an enlarged plan view, with portions brokenaway, of the head of one of the swinging roll-arms and spring-casingapplied thereto. I v The same letters-of reference are used to in dicatelike parts in all the figures.

WVithout going into a description of the de tails of the machine, whichcould be built to suit the requirements of the manufacturer, I wouldthus describe mypresent invention, and also that part of Livingstons towhich I have referred, by which the operation of the device will be moreclearly understood.

A is the hopper of the machine, having a raised bottom, 13, sloping eachway from the center, with discharge-outlets for the grain on each side,and extending the entire width of the hopper. These outlets are openedand F, keyed or fastened near its outer end on one u side of themachine. Upon this through-shaft, under the hopper, is j ournaled asleeve, G, so as to be capable of oscillation independent of the shaftE, and extending from and integral with said sleeve, if desired, is anarm, H, which extends out and under the shaft E.

Pivoted loosely upon the outer end of the shaft E, and side by side withthe lever F, is a second hand-lever, I, whose lower end is bolted orotherwise securely attached to the outer end of the arm H, in suchmanner that the swinging of the lever Iwill cause the oscillation of thesleeve G, as will be readily understood. In addition to its attachmentto the lever I, the sleeve G is held from sliding upon the shaft E bymeans of a collar, J bearing against its outer end, and secured to saidshaft by a set-screw, 0. Up on the sleeve G is a screwpitched quadrantor wing, K, whose outer edge or periphery is confined between lugs (l onthe under side of the sliding frame or spider a.

From the above construction it will be read ily seen that by turning thelever Ithe sleeve G will be oscillated, the spider a caused to slide onits rod by means of the quadrantwing, and the gates simultaneouslyoperated for any purpose required, whether to open, close, or adjustthem, and this without the necessity of moving the lever F oroscillating the shaft E. "The shaft E has on each side of the machinedouble diametrically-opposite cams or eccentrics L, upon which areloosely fitted the eyes of the inner ends of the rods N, extending toand operating the swinging roll supports or arms M. These rods N extendout through apertures in the heads of the roll-supporting arms M, andare secured theretoin the following manner: Over each head is fitted ahousing-cap, 0, Fig. 3, open on its under side,

I I r 4 and containing a coiled spring, e,which is confined between theouter side of the head and the outer end of the housing, which, on itsinner side, is provided with a retaining-boss, f,

as shown. The rods N likewise pass through the ends of the housing 0.The inner head of each housing has tapped into it a female nut, 9,bearing against the inner side of the head, and through which the rod Nloosely passes, and just on the inner side of the female nut 9, upon thethreaded end of the rod N, is a jamnut or wheel, 71 Upon the threadedouter end of each of the rods N is an adjusting nut or wheel, 1'.

7 From this description it will be readily seen that by means of thefemale nut g and wheel i the adjustment of the roll-supporting arms Mand the initial tension of the springs 6 can be regulated to a nicetyfor the purpose of ad 0 justing the rolls of each pair to each other andregulating their yielding point.v

I have not shown the manner of mounting the pivoted swinging arms M, asthis is well known.

From the description I have given it will be seen that by operating thelever F the arms M, carrying the outer rolls, will be thrown apart orbrought together, as desired, so as to spread the rolls apart or bringthem into working position.

Having thus fully described my invention, I clai1n The combination, withthe rods N and j ournal-arms M, of the spring-housing 0, spring 0,hand-wheel i, female nut g, and jam-nut h, substantially as described,and for the purpose specified.

HENRY J. GILBERT.

'Witnesses:

QUINCY CoRwIn, E. W. REo'roR.

